Answer:
45
Step-by-step explanation:
When you're completing the square you're adding (b/2)^2 which in this case is (-5)^2 or 25. This is because when you rewrite it as a square binomial you write it in the form (x+(b/2))^2 which is going to result in x^2+b+(b/2)^2. Since you need to reach 25 you need to add 45 since the last value is at -20.
Answer with Step-by-step explanation:
We are given that


We have to find the speed of river's current and the direction of current flowing.

Speed of river's current=
Speed of river's current=
Speed of river's current=
By using the formula

Direction of current flowing,

The angle lies in third quadrant therefore

Answer:
B
Step-by-step explanation:
5^2 - 3^2 = 4^2 So you know that 4 is the height. 4^2 + 7^2 is 65. Find the square root. Square root of 65.